The answer is 1.4 l of water is required to dissolve 100 g NaCl to prepare 1.5 M solution .
Molarity (M) is the amount of a substance in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution.
Molarity is also known as the molar concentration of a solution.
The units of molarity are M or mol/L.
M = moles solute / liters solution
Molecular weight of NaCl is 58.44 g
Moles of NaCl = Mass of solute / Molar mass
Moles of NaCl = 100 / 58.44
= 1.711 moles
To prepare 1.5 M solution
1.5 = 1.711 / litres of solution
litres of solution = 1.711/1.5
litres of solution required is 1.14 l
Therefore 1.4 l of water is required to dissolve 100 g NaCl to prepare 1.5 M solution .
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